Sports leagues similar to or like Major League Baseball

One of the most popular sports for both participants and spectators. Major League Baseball. Wikipedia

The history of baseball in the United States dates to the 18th century, when boys and amateur enthusiasts played a baseball-like game by their own informal rules using homemade equipment. The popularity of the sport grew and amateur men's ball clubs were formed in the 1830-50s. Wikipedia

The major professional sports leagues in the United States and Canada are the highest professional competitions of team sports in those countries. The four leagues traditionally included in the definition are Major League Baseball (MLB), the National Basketball Association (NBA), the National Football League (NFL), and the National Hockey League (NHL). Wikipedia

Chief executive officer of Major League Baseball and the associated Minor League Baseball (MiLB) – a constellation of leagues and clubs known as "organized baseball". Under the direction of the Commissioner, the Office of the Commissioner of Baseball hires and maintains the sport's umpiring crews, and negotiates marketing, labor, and television contracts. Wikipedia

Annual championship series of Major League Baseball in the United States and Canada, contested since 1903 between the champion teams of the American League (AL) and the National League (NL). Determined through a best-of-seven playoff, and the winning team is awarded the Commissioner's Trophy. Wikipedia

Bat-and-ball game played between two opposing teams who take turns batting and fielding. The game proceeds when a player on the fielding team, called the pitcher, throws a ball which a player on the batting team tries to hit with a bat. Wikipedia